Lock-hinge



L. ABBOTT.

(M0del.).

LOOK HINGE.

No. 393,200. Patented Nov. 20, 1 888.

E5555. Mm,

NITED STATES PATENT LEVI ABBOTT, OF ARLINGTON, ASSIGNOR OF ONE-HALF TO THOMAS DOLBY, OF WATERTOWN, MASSACHUSETTS.

LOCK-HINGE.

SPECIFICATION forming part of LettersPatent No. 393,200, dated November 20, 1888.

Application filed February 4, 1888. Serial No. 263,039. (ModelJ To all whom it may concern.-

Be it known that I, LEVI ABBOTT, of Arlington, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Iinprovementsin Lock-Hinges, of which the following is a specification.

This invention has for its object to provide a blind-hinge of simple construction, adapted to serve both as a hinge and as a fastener to lock the blind when wholly closed, wholly open, and at one or more intermediate positions.

The invention consists in certain details of construction, all of which I will now proceed to describe and claim.

Of the accompanying drawings, forming a part of this specification, Figure 1 represents a perspective view of a portion of a windoweasing and a portion of a blind or shutter connected by a hinge embodying my invention, the blind being partly open. Fig. 2 represents a front elevation of the same, the blind being closed. Fig. 3 represents a section on line .r .r, Fig. 2. Figs. 4 and 5 represent views of the parts of the hinge separated. Figs. 6 and 7 represent the separated parts of ahinge of modified form embodying my invention.

The same letters of reference indicate the same parts in all the figures.

Referring first to Figs. 1 to 5, inclusive, (t represents the fixed member of the hinge, which is composed of a socket portion, 2, and a plate or leaf, 3, provided with screw-receiving holes, and adapted to bear on and be attached to a window-casing, b.

(1 represents the movable member of the hinge, or that member which is applied to the blind. Said member (Z is composed of a 'pintle adapted to enter the socket 2 and a lever which is pivoted at one end at c to the bottom rail of the blind, so as to swing vertically, the pintle being formed on the free end of said lever.

In the upper portion of the socket 2 are formed a series of radial slots, 5, and on the under side of the swinging end of the lever 61 are corresponding tenons, 6 6, formed to enter said slots when the lever d is depressed, and thus lock the two members together, so that the blind cannot swing. When the lever d is slightly raised, the tenons are withdrawn from the slots and the blind is enabled to swing.

Means are provided whereby the lover (I may be raised at its swinging end, said means being an arm, f, on the lever d, and a lever, g, pivoted to the inner edge of one of the stiles of the blind and engaged with said arm. Said lever g projects through the blind between the slats thereof, so that when the blind is closed a person at the inner side thereof can depress the lever g, and thus raise the lever d.

The slots 5 5 are suifficient in number and are suitably arranged to lock the movable member of the hinge when the blind is closed, or when it is open, orwhen it is in one or more intermediate positions. It willbe seen, therefore, that the hinge not only serves the usual purpose of a hinge in permitting the swinging of the blind, but also serves as a blind-fastening, so that the expense of a fastening independent of the hinge is avoided.

It will be bornein mind thattheupperhinge of the blind (not here shown) supports the downward pressure of the blind, so that the movable member is free to rise and fall, the locking-hinge of myinvention being thelower hinge of the blind.

Figs. 6 and 7 show a modified construction, in which the pintle and the tenons are formed on the fixed member and the socket and grooves in the movable member, the result being the same as that of the construction already described.

The pintle 4 may have longitudinal ribs 0- r to diminish its area in contact with the socket, and therefore reduce friction.

I claim- A locking'hinge composed of the movable member,whieh includes a lever, (1, adapted to be pivoted to a blind, and the fixed member adapted to be attached to a casing, one of the members having a pintle, c, and tenons 6, formed integral with said member, while the other member has a socket, 2, formed to receive the pintle c, and radial grooves 5, formed to receive the tenons (5, each member, with its locking devices, being made in a single integral piece, as set forth.

In testimony whereof Ihavesigued my name to this specification, in the presence of two subscribing witnesses, this 1st day of February, 1888.

LEVI ABBOTT.

Vitnesscs:

C. F. BROWN, ARTHUR W. OnossLnY. 

